Figure 7.

Protoplast viability analysis after exposure to 50 μg/ml SWCNTs in a WI solution. a Microscopic image of SWCNTs aggregates. b Fluorescence microscope image of total protoplasts (protoplasts stained with PI and
DAPI). c Fluorescence microscope image of dead protoplasts (stained with PI only). d Fluorescence-based assay showed that the inhibition activity of SWCNTs on the protoplasts
as the percent of protoplasts stained with PI or the percent of loss of viability.